A Study on the Hard Coal Grindability Dependence on Selected Parameters

A very important aspect of proper preparation the coal mixture for coking process is its appropriate grinding. One parameters describing energy input required grinding Hardgrove index. This research was undertaken to determine dependence grindability index on selected physicochemical properties coal. The determined using available methods described in standards, and examined. clear positive correlation with calorific value smaller (also positive) correlations moisture content free swelling obtained. slight negative also obtained sulfur content.